This is the second installment of my posts on the construction of Santiago Calatrava‘s Chicago Spire, destined to be the world’s tallest residential building. Much of the focus of this video encompasses the solidifying of the surface of the Spire for landscaping and parking and the challenges of laying the foundation near the Chicago River. Additionally, preview animation reflects how the lobby and successive floors will be laid and supported for America’s next tallest skyscraper.